Reservoir simulation in a North Sea reservoir experiencing significant compaction drive
The Valhall field in the Norwegian North Sea is a high porosity chalk reservoir undergoing primary pressure depletion. Over the last ten years there have been a number of computer modeling studies of the field which have all assumed an original oil-in-place of approximately 2,000 MMSTB (318.0{times}10{sup 6}m{sup 3}) to the present due to the addition of wells and the optimization of completion techniques. However, the single most important and unique feature influencing Valhall long term production performance is reservoir rock compaction. This paper describes the mathematical model used to simulate reservoir performance in a compacting reservoir with specific discussion regarding the proportion of oil produced by each physical recovery process. An understanding of the recovery mechanisms and their relative importance is critical for the successful management of the field. This paper also presents an alternative method for evaluating the various recovery processes using a simple solution to the material balance equation. This is used to substantiate the magnitude of the various recovery mechanisms identified in the simulation model.
- OSTI ID:
- 153082
- Report Number(s):
- CONF-950206-; TRN: IM9602%%174
- Resource Relation:
- Conference: Symposium on reservoir simulation, San Antonio, TX (United States), 12-15 Feb 1995; Other Information: PBD: 1995; Related Information: Is Part Of 13. Symposium on reservoir simulation: Proceedings; PB: 572 p.
- Country of Publication:
- United States
- Language:
- English
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